Acura doesn't tend to do concept cars these days that don't foreshadow a specific upcoming production model. The ZDX prototype of 2010 previewed the production version, as did the ILX and RLX showcars of 2012 and the MDX of 2013. The NSX concept is on its way to production, as the SUV-X concept is likely to do as well in the coming years. So when Acura revealed the TLX prototype at the Detroit Auto Show a few months ago, we all but knew it would only be a matter of time before that, too, would b

Herein lies the broom that will sweep away both the TL and the TSX, and its name is the Acura TLX Prototype. Proposed as a "red carpet athlete," the production midsize TLX will slot in between the ILX and RLX range-topper in the brand's sedan lineup while presenting its take on "luxury refinement and sports-sedan athleticism with exhilarating performance."